Check-valve.



PATENTES MAR. l?, 1908.

MW. FITNER.

CHECK VALVE, APPLIGATION'H'LED mY 29. 1007.

' hond, pump showing the valve device i Uri ,f ont? er i. ,di i iii UNITE@ Specification oi Letters jzttent.

lzt'tented Merch 1'?, 1968.

.improve und simplify the construction and operation of devices oi this eher-noter so es to he coinpnrntively easy and inexpensive to manufacture, thoroughlyr reliable and elli,-

'oient in use, and adopted 'for n variety oi purposes in which check valves are required.

A 'further object of the invention is the provision ol" a cheek valve including n eesingor chamber having inlet end outlet passages into either of which muy be iserted n stop for preventing the ball valve from closing the discharge port when the valve is inoved to iull open iosition. f

A still 'urther object is to provide :i valve casing having; oppositely disposed posse-ges into one of which is threaded s stop for the ball valve, end the other ol'l which terminates in a valve sont, the valve stop being so shaped es to permit ihiid to liow on opposite sides thereof..

Another obiect of the invention is the pro- Vision of e valve casing Contnining,y inlet and discharge valves for controlling the passage of llnid from one point to another end especially adapted for use in connection with nir -or other pumps, and it the seine time containing features rendering it adaptable lof more general use. y

`W1th these objects in view and others, ns will appear es the description proceeds, Jfhe 'invention comprises the vnlrions novel fentures oi construction ond arrangement ol' parts which will he niore 'fully descrihednnd Set forth with pznticulznity in the ele.' ns ep pended hereto. l

ln the ecoornpenving chewing, xviii-.ih illus-- tintes one of the embodiments of the ini/en tion, Figure l is side view ot en ordine-ry ziifplied thereto. ig. en enlarged longitudinni section of thedevice.

Fig. is o section on line 3 3, Fig. Fig. Il is it transverse section on line l-el, vl'`ie;. 2. lig. 5 is n perspective view of one ot the valve stops.

Similar reference characters nre employed to designate corresponding ports throughout the several views.

Referring to the drawing, A designates the cylinder ot en ordinary hund pnnip used for pninpii 5 up tires and for supplying nir under pressure for other purposes, the cylinder beine' mounted in the usuel innnner in n foot stirrup l, and having' e piston operated by the hondle '.lhe .tdznission und discharge oi" nir to :ind lroni the pump is controlled by iny improved 'valve 1vice desi united generally by l5., This device comprises n casing that clininhered nt opgfmsite ends for receiving the halls 4r, 'sind between the ohnmhers i und is n. connecting passage 7. T ie ends of the cylindrioni casing 3 exterioily threaded for receiving the cup nuts S sind 3,

`ln the present instellen, the nnt- S hns un 'Tol opening l() communicating with the atniospliere and. through which :iir is drawn into tl'iepinnp, sind t ie inner end ol the opening fornis 'u volvo sont :it l l. with which the lower lmll vulve eng; ges, :1nd the upper nut 9 e0- oporntos with :L truste conical spreading nieniner 12 for connecting' n. hose or other 'pipe .125 to the vnlvc easing. ln onse the valve device is nsed in o. ges or liquid system, un inlet pipe een he connected with the inlet chrnnher 5 in the snnie nninner thnt pipe i3 connut-ted with the device,- the enter-nel threads on the casing 3 permitting of the recoptiini oi the nut i). The top end of the 'p rtssnge 7 terminates in n sont il tor the dis charge volvo. ln order to prove i the vnl ves from closingrr the lower ends ol' the posseggo 'j' oi the cosi lnns "e 1:3 oi the spreiiding ginissnges, the hemd or lovve r end ol these stops being' errttnged to extend into the chambers 'o and 6 e sniiieient distance to prevent the valves fron: engaging the ends o the passages. is show-.n in YFig. 5, euch stop is in the forni ol" n test is 'thtt so that when inserted in its pe nge, it 'will not close the letter. The stops niej he secured in place in any approved manner, es for instance by tapping the ps sages "f and 15 und screwing the stops into the sinne. yThey are just thin enounih-to have the necessary mechnicel strength to it being advantageous to make the stops thin as to restrict the passages little as `posand hence, reduce the resistance to the flow of' liquid. For attaching the device to a pump, externally threaded coupling member 17 is inserted in the enlarged or countcrbored portion 18 of the passage 19 that communicates with the passage 7 at a point intermediate the ends of the latter, the coupling member 17 being braced or otherwise suitably secured or cast integral with the casing 33, it' desired. he outer end of the coupling member 17 is screwed into the pump cylinder or suitable part and communicates vfith the interior of the cylinder.

The opera tion of the device may be briefly described as followsz-l3y moving the pis-- ton ol the pump outwardly, the inlet valve will be raised so as to admit air and the discharge valve will rest on its seat 14 by the combined. e'ect of the pressure in the pipe 13, suction in the passage '7, and gravity. The

enters' the chamber 5 through the inlet 10, and 'Hows through the passage 7 at opposite sides el the lower stop 16, and thence to the pump tlirough the passage 19 and coupling member 17. At the end of the upstrolie, the inlet valve will drop and close the inlet port, and as the pump piston is moved downwardly, the air is l'orced out of the cylinder into the ci sing 3, thereby lifting the discl f1 valve and permitting the air to pass through the chamber G, passage and into the discharge pipe 1S to the point ot conf As soon as the llow of air ceases, the nr valve vill automatically seat and will thus hold the pressure in the pipe 13 and apparatus supplied thereby.

in order to render the device reversible, or that is to say, use the chamber 6 as an inlet and the chan t' 5 as an outlet, the passage 1t) nut n is threaded so as to receive the .stop it?, and the passage 7 is threaded at both ends, so tl the stop can be removed from the spreading member 12 and inserted in the said. pas;'-=age. fbviously in this case, the casing would be arranged so that "what is now the upper end Would be lowermost to insure the automatic closingl olE the valves by gravi Furthermore, to en able this interability, the top and bottom' ends ol' ambcrs 5 and (j arc provided with seats. in other words, the chamber 5' has a valve seat 19 opposite the seat 11 and the spreading member 12, a seat 20 opposite the seat 14. Since the passages 7,10 and l5 are threadedat their inner ends, it is preferable te counter-bore said inner ends so that sharp edges are presented to .the valves, thereby "nevonting any sediment or grit get- 'en the vait/'es and their seats, as ai were cm- 't the shocks of the valves striking them,

From the foregoing description, taken in connection with the accompanying drawing, the advantages of the construction and of the method of operation will be readily apparent to those skilled in the art to which the invention appertains, and while l'have described the principle of operation of the invention, together with the apparatus which IS nOW consider te be the best embodiment thereof, I desire to have it understood that the apparatus shown is merely illustrative and that such changes niay be made when desired, as are Within the scope of' the claims, l

Having thus described the invention, what is claimed, is :-f

1. The combination ot' a casing having threaded passages, seat-s at the inner ends of either one of the seats, and a removable stop threaded in the passage serving as an abutment for preventing the valve from engaging the seat of the outlet passage.

2. The combination of a casingv having oppositely disposed passages, seats'at the inner ends of the passages, a valve adapted to engage one of the seats, and a removable stop of ilat T-shaped form adapted to' iit ine terchangeably in either of the passages for preventing the valve from engaging the seat of such passage,

3. rlhe combination of a casing provided with a chamber having a passage, a removable member closing one side of the chamber and provided with apassage, said passages beine' threaded and counterbored at their inner ends to form suitable valve seats, a ball valve and a. stop having a threaded engagement with either one of the passages for preventing the valve i'rom closing the seat ot' such passage.

1. The combination of a casing having chambered ends, ball valves in the chamber,` valve seats in the chambers, e threaded passage between the chambers, threaded inlet and outlet passages, and stops for the valves having threaded engagement vvith the outlet passages ot' the chambers.

lhc combination of a casing having two chambers, admission and discharge openings l'or each chamber, ball valves in the chambers, a conduit in the casing'. connecting the dismission openingl ol the other chamber, a combined inlet and outlet passage communicating with the conduit, and removable Stops at the discharge openings for preventing the valves from closing the latter and adapted to be used intcrchangeably in either ofthe openings of each chamber for reversing the action 'ol the valves.

with a chamber' having a. passage, a' spreading with the spreading member for connecting a,

the passages, a ball valve arranged to engage chai-we o )enine' ol one chamber with the ad- (i. The combination of a casing providedy member having a passage, a nut cooperating in the chamber for engaging one of the seats,

ipe with the casing, a ball valvein the oharn-y tending out of' the passage to form a valveA Ber, seats at the inner ends of the passages, stop. 10

and a. stop adapted for use at either seat for ,1n testimony whereof, I afx my signature preventing .the valve from engaging the same. in presence of two witnesses.

5 7. The combination of a member having a MARION W. PITN threaded passage, and a fiat piece having Witnesses: teeth in its side edges engaging the thread of JOHN L. FLETCHER,

the passage and arranged with a portion ex- CHATTIN BRADWAY. 

